Reamer and blade-adjusting means therefor



Oct. 8, 1929. F. M. ENOS 1,730,495

REAMER AND BLADE ADJUSTING MEANS THEREFOR 7 Filed Dec. 10, 1927 FRED M. ENOS, F ELKHART, INDIANA REAMER AND BLADE-ADJUSTING MEANS THEREFOR Application filed. December 10, 1927. Serial No. 239,073.

My invention relates to adjustable reamof which slots has an inclined bottom sloping ers, the cutting blades whereof are longiupwardly toward the forward or outer end of tudinally adjustable; the reamer body 1 and extending there- Many forms of adjustable reamershaving through. 1 r

5 inserted cutting blades have been built, but Each of the cutter blades is made of suit- 55 almost all of such tools have one or more able material and has an inclined or sloping serious disadvantages, the main one being bottom or inner edge 5 corresponding with the tendency of the blades to loosen while the angularity 6 of the bottom of the blade the reamer is in use. slots, a cutting edge 7 and a side wall 8 which The principal object of my invention is to is somewhat inclined or angular relatively to 60 provide an adjustable reamer in which the the opposite wall of the blade. An abutment blades cannot loosen while the reamer is in collar 9 is screw threaded upon the holder use, the blade fastening means including the section 10 and against which the inner ends deformation of the metal of the blade holder of the blades normally rest, said collar servagainst the side of the blade. ing to maintain'the juxtaposition of the 65 A further object of the invention includes blades and to prevent retractive movement means for longitudinally adjusting the cutthereof. ting blades of the reamer by pressure applied The blade slots 4 are originally formed at the blade ends. Other objects of the inwith parallel side walls to enable the inservention are mentioned and described herein. tion of the blades, and to rigidly fasten each 0 The preferred embodiment of the invenblade within its slot the side wall 11, which tion is illustrated in the accompanying drawis adjacent the inclined blade wall 8, is lating, wherein Figure 1 is a side View of the erally deformed or pressed against the blade reamer carrying inserted. cutting blades sewall 8 by any means such as hammering, for

cured in the holder according to my invenexample. .To facilitate the lateral bending tion; Fig. 2 is a section taken longitudinally or deformation of the slot'wall 11 a longiof Figure 1 through two of the blade slots; tudinal groove or recess 12 is formed in the Fig. 3 is an end view of the blade holder secholder 1 adjacent the slot 4. This method tion of the reamer; Fig. 4 is a fragmental results in a very rigid mount for the blades,

30 transverse section through one of the blades, one that eflectually prevents loosening of the the blade slot and a fragment of the blade blades during the use of the reamer. Never holder illustrating the condition of the blade theless the blades may be moved longitudislot wall and the metal in the blade holder nally in their slots for adjustment thereof prior to deformation. thereof against the by the application of pressure upon the blade blade and while the blade is loosely arranged ends, as hereinafter described. in its slot; Fig. 5 is a view similar to Fig. 1 The numeral 13 indicates an anvilelement and including the tool means for effecting which is apertured at 1a which, when used in blade adjustment; and Fig. 6 is an end View connection with the tool 16, enables the opthereof. r erator to apply pressure upon the blade ends 40 Similar numerals of reference indicate like of the reamer for adjustment thereof. The '99 parts throughout the several views on the abutment collar 9 is removed from the reamer. drawing. body and the collar 15 is loosely mounted" Referring to the details of the drawing thereon in its place, the bore of said collar the numeral 1 indicates the cylindrical reambeing of larger diameter than the reamer 45 er body or blade holder which may be probody. The shank 2 is then thrust through 5 vided with the usual shank section 2 of rethe anvil openingl l and suspended therein. duced structure. The section 1 of the reamer With the collar 15 resting upon said anvil.

is provided with a plurality of cutting blades The tool 16 may comprise the stud 17 upon 3, 3 which are longitudinally slidable in the which the gauge collar 19 is screw threaded blade slots 4, 4: formed in said. section, each and longitudinally adjustable thereon thereby,the screw threads 18 preferably termi nating intermediate the stud extremities. The space 20 between the collar 19 and the outer ends of the blades 3 regulates the degree of blade adjustment, and such adjustment may be readily made when pressure is applied to the upper or outer end 21 of the tool stud-17 when the opposite end of said stud V is resting against the outer end of the blade holder 1. Y

' In such a manner and by the means described the blades 3 may all be simultaneously driven longitudinally in their slots, for adjustment, and against the face of the gauge 5' collar 19, the latter functioning as a stop element and which obviously may be set at any desired distance from the blade ends I claim:

1. Means for longitudinally adjusting the 2 cutting-blades of an adjustable reamer, comprising an anvil element adapted to be engaged by theinner ends of the cutting blades, and a tool adapted to exert pressure upon the outer end of the blade holder, said tool car- '25 rying a stop element to limit the movement of the blades.

2; Means for longitudinally adjusting the cutting blades of an adjustable reamer, comprising an apertured anvil element adapted to support the reamer by engagement of the inner ends of the blades therewith, a tool adapted to exert pressure upon the outer end of the blade holder axially of the latter, and a stop element adj ustably mounted upon said tool to limit the movement of the blades.

In witness whereof I have hereunto aifixed my signature this 8th day of December,

FRED M. ENOS. 

